/*-------------------------------------------------------------------------
 *
 * paramassign.h
 *		Functions for assigning PARAM_EXEC slots during planning.
 *
 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/optimizer/paramassign.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef PARAMASSIGN_H
#define PARAMASSIGN_H

#include "nodes/relation.h"

extern Param *replace_outer_var(PlannerInfo *root, Var *var);
extern Param *replace_outer_placeholdervar(PlannerInfo *root,
							 PlaceHolderVar *phv);
extern Param *replace_outer_agg(PlannerInfo *root, Aggref *agg);
extern Param *replace_outer_grouping(PlannerInfo *root, GroupingFunc *grp);
extern Param *replace_nestloop_param_var(PlannerInfo *root, Var *var);
extern Param *replace_nestloop_param_placeholdervar(PlannerInfo *root,
									  PlaceHolderVar *phv);
extern void process_subquery_nestloop_params(PlannerInfo *root,
								 List *subplan_params);
extern List *identify_current_nestloop_params(PlannerInfo *root,
								 Relids leftrelids);
extern Param *generate_new_exec_param(PlannerInfo *root, Oid paramtype,
						int32 paramtypmod, Oid paramcollation);
extern int	assign_special_exec_param(PlannerInfo *root);

#endif							/* PARAMASSIGN_H */
